C21 steroids from the stems of Marsdenia tenacissima
Lei, Y-Sheng.; Li, Z-Lin.; Yang, S-Shen.; Liu, Z-Lan.; Hua, H-Ming.
Yao Xue Xue Bao 43(5): 509-512
2008
ISSN/ISBN: 0513-4870 PMID: 18717339 Document Number: 618130
To study the C-21 steroids of the stems of Marsdenia tenacissima (Roxb.) Wight et Arn, various chromatography methods were used for the isolation of the constituents and their structures were identified by spectral analysis. Eight C-21 steroids were isolated from the CHCl3 extract, which were identified as 11 alpha-O-tigloyl-17 beta-tenacigenin B (1), 17 beta-tenacigenin B (2), tenacigenoside A (3), 11 alpha-O-2-methylbutyryl-12 beta-O-acetyl tenacigenin B (4), tenacissoside H (5), marsdenoside A (6), tenacissoside G (7), and tenacissoside 1 (8). Among them, compound 1 is a new compound.